Claude is watermarking text — giving Serbian SaaS a new EU task
Anthropic plans to embed machine-readable marks in text from new Claude models and attach signed provenance data to supported files. The change applies worldwide and is driven by the EU AI Act’s transparency rules.
What is changing
On August 12, Anthropic detailed its implementation of the European rules: Claude models launched in the EU on or after August 2, 2026 are to embed watermarks in generated text, while supported SVG, PNG and JPG files will carry signed C2PA provenance metadata. The marks apply beyond the EU, including across the Claude API, Claude Code, Cowork and supported cloud platforms.
A mark is not proof of authorship
Anthropic cautions that a detected mark only indicates that content may have been processed by Claude. It can appear when Claude merely proofreads or translates human writing, while heavy editing, paraphrasing or stripped metadata can weaken detection. Machine-readable marking therefore does not replace a company’s own records or visible disclosure in the cases where EU rules require it.
Serbia is not outside the perimeter
The EU AI Act also covers providers and deployers established in third countries when an AI system’s output is used in the Union. A Serbian company embedding Claude in a product for EU customers may therefore fall within scope and must assess its own obligations; Anthropic explicitly says its marking mechanism does not perform that assessment for developers.
Virtual Arc’s position is that this is not primarily a story about catching people who write with AI. It is a warning that Serbian software companies can no longer select a model only on output quality, speed and price. If a product built in Serbia reaches EU users, the vendor must provide usable provenance, documentation and detection support that fits into the buyer’s own controls. We would not accept “Anthropic adds a watermark” as evidence that a product is compliant. Teams still need model-level records, preserved metadata, publication rules and a clear allocation of responsibility with each customer. Serbian firms that build this evidence chain before an EU buyer sends a security or compliance questionnaire can turn their non-EU location into an operational advantage. Those that wait will discover that being headquartered outside the Union does not place their software outside the expectations of the European market.